⚠️ Rear-wheel ABS only (RWAL system). No programming required, but brake bleeding procedure mandatory after replacement.
Electronic Control Module (ECM)1.2 hr R&Rrelearn only +0.3 hr▸ programming details
📍 passenger side firewall, below glove box area
🔧 Tech 1 with MEMCAL/PROM chip swap
⚠️ All 1987-1989 K1500 models use TBI with ECM. Programming via physical MEMCAL/PROM chip replacement. Requires idle relearn after installation.
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 1987 GMC K1500 6.2L V8 and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years.